Multi-Keyword Searchable and Verifiable Attribute-Based Encryption over Cloud Data

2021 ◽  
pp. 1-1
Author(s):  
Yinghui Zhang ◽  
Tian Zhu ◽  
Rui Guo ◽  
Shengmin Xu ◽  
Hui Cui ◽  
...  
Keyword(s):  
Cloud Data ◽  
Attribute Based Encryption

Control Cloud Data Access Privilge Anonymity with Attributed Based Encryption

2017 ◽  
Vol 7 (8) ◽  
pp. 279
Author(s):  
P. Sudheer ◽  
T. Lakshmi Surekha
Keyword(s):  
Data Privacy ◽  
Low Cost ◽  
Data Access ◽  
Privacy Concerns ◽  
Cloud Data ◽  
Computing Paradigm ◽  
Attribute Based Encryption ◽  
Data Content ◽  
Identity Privacy ◽  
Cloud Servers

Cloud computing is a revolutionary computing paradigm, which enables flexible, on-demand, and low-cost usage of computing resources, but the data is outsourced to some cloud servers, and various privacy concerns emerge from it. Various schemes based on the attribute-based encryption have been to secure the cloud storage. Data content privacy. A semi anonymous privilege control scheme AnonyControl to address not only the data privacy. But also the user identity privacy. AnonyControl decentralizes the central authority to limit the identity leakage and thus achieves semi anonymity. The  Anonymity –F which fully prevent the identity leakage and achieve the full anonymity.

scholarly journals A Survey on Audit Free Cloud Storage via Deniable Attribute Based Encryption

2016 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
P. Santhi ◽  
S. Thilagamani
Keyword(s):  
Cloud Computing ◽  
Third Party ◽  
Cryptographic Primitives ◽  
Public Auditing ◽  
Cloud Data ◽  
Transmission Cost ◽  
Attribute Based Encryption ◽  
New Development ◽  
Distribution Of Resources ◽  
Privacy And Confidentiality

<div><p><em>Cloud computing is a rising technology which provider an assortment of opportunities for online distribution of resources or services. The most effective advantage of using cloud computing is higher availability of services with less cost and simple scalability. While the storage space of shared data on remote servers is not a new development, current development of cloud computing validates a more careful look at its actual consequences involving privacy and confidentiality issues. As users no longer actually possess the storage of their data, traditional cryptographic primitives for the purpose of data protection cannot be directly accepted. In particular, simply downloading all the data for its integrity confirmation is not a realistic explanation due to the expensiveness in I/O and transmission cost across the network. Besides, it is often not enough to detect the data corruption only when contacting the data, as it does not offer users correctness assurance for those un-accessed information and might be too late to recover the data loss or damage. To fully make sure the data integrity and save the cloud users’ calculation resources as well as online burden, it is of critical importance to allow public auditing service for cloud data, so that users may choice to an independent third party auditor (TPA) to audit the contract out data when needed. The TPA, who has expertise and abilities that users do not, can occasionally check the honesty of all the data stored in the cloud on behalf of the users, which provides a much more better and reasonable way for the users to ensure their storage rightness in the cloud. In a word, allowing public auditing services will play an important role for this emerging cloud market to become fully recognized; where users will need ways to evaluate risk and gain hope in the cloud. </em></p></div>

scholarly journals RSA-CP-IDABE: A Secure Framework for Multi-User and Multi-Owner Cloud Environment

Information ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 382
Author(s):  
Sonali Chandel ◽  
Geng Yang ◽  
Sumit Chakravarty
Keyword(s):  
Low Cost ◽  
Cloud Environment ◽  
Cloud Data ◽  
The Public ◽  
Security Issues ◽  
Attribute Based Encryption ◽  
Man In The Middle ◽  
Secret Keys ◽  
Encryption Decryption ◽  
Ciphertext Policy

Cloud has become one of the most widely used technologies to store data due to its availability, flexibility, and low cost. At the same time, the security, integrity, and privacy of data that needs to be stored on the cloud is the primary threat for cloud deployment. However, the increase in cloud utilization often results in the creation of a multi-user cloud environment, which requires its owners to manage and monitor the data more effectively. The security of information faces an additional threat, which is related to the increasing number of users and owners who deal with the data stored on the cloud. Many researchers have developed several frameworks and algorithms to address the security issues of the cloud environment. In the present work, a novel algorithm is proposed with the integration of Ciphertext Policy-Identity Attribute-based Encryption (CP-IDABE) and the Rivest–Shamir–Adelman (RSA) algorithm for securing the cloud. Both the owners and users are provided with the public and distinct secret keys that are generated by the Automated Certificate Authority (ACA). The attribute policy differentiates between the user and owner for accessing the cloud data. The proposed RSA-CP-IDABE algorithm also prevents the Man in the Middle (MITM) attack effectively. The performance of the proposed algorithm is evaluated for its time used for encryption, decryption, and execution for varying sizes of data. The obtained results are compared with the existing framework to show its effectiveness. The proposed algorithm can be enhanced with the revocation of privileges in the future.

scholarly journals BCAS: A blockchain-based ciphertext-policy attribute-based encryption scheme for cloud data security sharing

2021 ◽  
Vol 17 (3) ◽  
pp. 155014772199961
Author(s):  
Yuting Zuo ◽  
Zhaozhe Kang ◽  
Jian Xu ◽  
Zhide Chen
Keyword(s):  
Data Privacy ◽  
Discrete Logarithm ◽  
Third Parties ◽  
Third Party ◽  
Encryption Scheme ◽  
Cloud Data ◽  
Attribute Based Encryption ◽  
Encryption Schemes ◽  
Trusted Third Parties ◽  
Ciphertext Policy

It is the most important and challenging problem to share the data safely in cloud computing. Some so-called trusted third parties may also infringe users’ data privacy. It is an urgent problem for data owners to share data safely with the designated users rather than the third party or other users. Traditional encryption schemes utilize different keys to produce multiple encrypted copies of the same data for users. It is no longer applicable for cloud data sharing security. Attribute-based encryption can solve above problems, but it needs to rely on trusted third parties to protect the users’ privacy. In this article, in order to address the above problems, we propose a blockchain-based ciphertext-policy attribute-based encryption scheme for cloud data secure sharing without relying on any trusted third parties. Blockchain-based ciphertext-policy attribute-based encryption scheme can protect the rights and security of data owner. Compared with existing cloud security schemes, the proposed scheme has more advantages in terms of the six aspects: (1) data owners have the authority to decide who can decrypt the data; (2) the operations of users are retained permanently, and all records are tamper-proof; (3) our proposed scheme has the characteristic of “one-to-many” encryption, and data is encrypted only once; (4) our scheme does not rely on any trusted third party; (5) in terms of the discrete logarithm problem and decisional q parallel-bilinear Diffie–Hellman exponent problem, we prove that our proposed scheme is secure; and (6) experiment shows that our proposed scheme is more efficient than the comparative scheme.

scholarly journals Towards Virtuous Cloud Data Storage Using Access Policy Hiding in Ciphertext Policy Attribute-Based Encryption

2021 ◽  
Vol 13 (11) ◽  
pp. 279
Author(s):  
Siti Dhalila Mohd Satar ◽  
Masnida Hussin ◽  
Zurina Mohd Hanapi ◽  
Mohamad Afendee Mohamed
Keyword(s):  
Data Storage ◽  
Cloud Storage ◽  
Security Analysis ◽  
Data Access ◽  
Logical Connective ◽  
Encrypted Data ◽  
Cloud Data ◽  
Access Policy ◽  
Attribute Based Encryption ◽  
Ciphertext Policy

Managing and controlling access to the tremendous data in Cloud storage is very challenging. Due to various entities engaged in the Cloud environment, there is a high possibility of data tampering. Cloud encryption is being employed to control data access while securing Cloud data. The encrypted data are sent to Cloud storage with an access policy defined by the data owner. Only authorized users can decrypt the encrypted data. However, the access policy of the encrypted data is in readable form, which results in privacy leakage. To address this issue, we proposed a reinforcement hiding in access policy over Cloud storage by enhancing the Ciphertext Policy Attribute-based Encryption (CP-ABE) algorithm. Besides the encryption process, the reinforced CP-ABE used logical connective operations to hide the attribute value of data in the access policy. These attributes were converted into scrambled data along with a ciphertext form that provides a better unreadability feature. It means that a two-level concealed tactic is employed to secure data from any unauthorized access during a data transaction. Experimental results revealed that our reinforced CP-ABE had a low computational overhead and consumed low storage costs. Furthermore, a case study on security analysis shows that our approach is secure against a passive attack such as traffic analysis.

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